Mobile Ad hoc Network (MANET) is a set of wireless devices that can move around freely and cooperate with each other in relaying packets without the support of any fixed infrastructure or centralized administration. The absence of any central administration or base station in the MANET makes the routing between nodes more complex compared to wireless networks. Since MANETs are useful in disaster and military operations, the need for the group communication is vital. Most of the routing protocols proposed for ad hoc networks assume a trusted, non-adversial environment and do not take security issues into account in their design. But in real time a MANET is vulnerable to attacks than a wired or infrastructure wireless network. This thesis investigates the security of Optimized Link State Routing protocol (OLSR), a well known routing protocol in MANET by identifying the impact of malicious nodes called Gray Holes on it. Thus, a security extension to address the gray hole attack in OLSR routing has been proposed and the solution is achieved in a simulation environment using NS-2 simulator.

MANET, infrastructureless network, OLSR, gray holes

[1] P. Sankareswary, R. Suganthi, G. Sumathi “Impact of Gray hole nodes in Multicast Adhoc On Demand Distance Vector Protocol ”, In the Proceedings of the 2010 IEEE International Conference ICWCSC 2010, SSN Engineering College, Chennai, India, 2010
[2] P. Jacquet, P. Muhlethaler, T. Clausen, A. Laouiti, A. Qayyum, L. Viennot, “Optimized Link State Routing Protocol for Ad Hoc Networks”, Hipercom Project, INRIA Rocquencourt, BP 105, 78153 Le Chesnay Cedex, France.
[3] L. M. Mary Jelba, S. Gomathi, “Mitigating Different Attacks in OLSR Protocol – A Survey”, International Journal of Inovative Research in Computer Science and Communication Engineering, Vol.4, Issue 6, June 2016
[4] S. Sharma and R. Gupta, “Simulation Study of black hole attack in the mobile ad hoc networks”, Journal of Engineering Science and Technology, pp.243-250, 2009.
[5] Kshitij Bhargava, Dinesh Goyal, “Packet Dropping Attacks in Manet: A Survey”, Journal of Advanced Computing and Communication Technologies, Vol.2, Issue No.3, June 2014
[6] Rupali Sharma, “Gray-hole Aattack in Mobile Ad-hoc Networks: A Survey”, International Journal of Computer Science and Information Technologies, Vol.7, Issue.3, 2016
[7] Biswaraj Sen, Kalpana Sharma, M.K.Ghose, Achute Sharma “Gray Hole Attack in MANETs”, International Journal of Advances in Electronics and Computer Science, Vol.2, Issue.10, Oct, 2015.
[8] Onkar V. Chandure, V.T.Gaikwad, “Detection & Prevention of Gray Hole Attack in Mobile Ad-Hoc Network using AODV Routing Protocol,” International Journal of Computer Applications , Vol.41, Issue.5, March, 2012
[9] S.V. Vasantha, Dr.A. Damodaram, “A Defense Model for Black hole and Gray hole Attacks in MANET”, IJCSMC, Vol.3, Issue. 11 pp.570-576, 2014.
[10] Madhuri Gupta, Krishna Kumar Joshi, “A Review on Detection and Prevention of Gray-Hole Attack in MANETs”, International Journal of Scientific & Engineering Research, Vol.4, Issue.11, November, 2013.